fix(managed-agents): boot reconcile survives pin-less records

Boot reconcile minted zero 30179s on a store with any record whose
legacy relay_url pin is "". Two defects compounded:

- buzz-core validate_identity_and_config rejected an empty relay_url.
  The per-record pin has been ignored at read time since #2122 (the
  agent resolves to the active workspace relay), so "" is a legal
  record and must encode. Keep only the 4096 upper bound.
- reconcile_agents_in_dir_with used `?` on each record, so the first
  build failure aborted the loop and every record after it in file
  order was never visited. Log the failing record and keep walking;
  each record is its own transaction, so partial progress is safe.

Tests: buzz-core `empty_relay_url_is_accepted`; desktop
`empty_relay_url_pin_does_not_abort_boot_reconcile` writes a pin-less
record followed by a normal one and asserts both get 30177 and a
decryptable 30179. The desktop test fails on f7c247756 with
"invalid relay_url length" and passes with this change.

Co-authored-by: Meli <5aaa86bce934fc3445fc254aab560a40923f10252f92107e665073dede0e04d3@buzz.block.builderlab.xyz>
Signed-off-by: Meli <5aaa86bce934fc3445fc254aab560a40923f10252f92107e665073dede0e04d3@buzz.block.builderlab.xyz>

crates/buzz-core/src/private_managed_agent.rs

@@ -417,7 +417,9 @@ fn validate_identity_and_config(
     if let Some(auth_tag) = &identity.auth_tag {
         validate_auth_tag(auth_tag, &owner.to_hex(), agent)?;
     }
-    if config.relay_url.is_empty() || config.relay_url.len() > 4096 {
+    // Empty is legal: a pin-less agent resolves to the active workspace relay
+    // at read time, so only the upper bound is enforced here.
+    if config.relay_url.len() > 4096 {
         return Err(Error::InvalidPayload("invalid relay_url length".into()));
     }
     if config.name.is_empty() || config.name.len() > 4096 {
@@ -764,6 +766,16 @@ mod tests {
         ));
     }
 
+    /// A pin-less agent (empty `relay_url`, legal since the per-record pin
+    /// became read-time-ignored) must still produce a valid payload.
+    #[test]
+    fn empty_relay_url_is_accepted() {
+        let owner = Keys::generate();
+        let mut candidate = payload(&owner, &Keys::generate());
+        candidate.config.relay_url.clear();
+        validate_payload(&candidate).unwrap();
+    }
+
     #[test]
     fn valid_owner_attestation_passes_and_binds_agent() {
         let owner = Keys::generate();

desktop/src-tauri/src/managed_agents/reconcile.rs

@@ -144,8 +144,12 @@ fn reconcile_agents_in_dir_with(
             continue;
         }
 
-        if retain_agent_record_at_boot(&conn, keys, record)? {
+        // One unpublishable record must not strand every record after it in
-            reconciled += 1;
+        // file order: log it and keep walking.
+        match retain_agent_record_at_boot(&conn, keys, record) {
+            Ok(true) => reconciled += 1,
+            Ok(false) => {}
+            Err(e) => eprintln!("buzz-desktop: agent-event-reconcile: {e}"),
         }
     }
 

desktop/src-tauri/src/managed_agents/reconcile/tests.rs

@@ -258,6 +258,51 @@ fn keyring_resident_nsec_is_hydrated_for_private_config() {
     assert_eq!(payload.identity.private_key_nsec, nsec);
 }
 
+/// A record whose legacy `relay_url` pin is empty (legal since #2122 — the
+/// pin is ignored at read time) must not stop the boot reconcile: the records
+/// after it in file order still get their first 30179.
+#[test]
+fn empty_relay_url_pin_does_not_abort_boot_reconcile() {
+    use nostr::ToBech32;
+
+    let owner_keys = nostr::Keys::generate();
+    let pinless_keys = nostr::Keys::generate();
+    let later_keys = nostr::Keys::generate();
+    let mut pinless = sample_record(&pinless_keys.public_key().to_hex(), "pinless");
+    pinless.relay_url.clear();
+    pinless.private_key_nsec = pinless_keys.secret_key().to_bech32().unwrap();
+    let mut later = sample_record(&later_keys.public_key().to_hex(), "later");
+    later.private_key_nsec = later_keys.secret_key().to_bech32().unwrap();
+
+    let dir = TempDir::new().unwrap();
+    write_store(&dir, &[pinless, later]);
+    let db_path = dir.path().join("retention.db");
+    reconcile_agents_in_dir_with(
+        dir.path(),
+        &owner_keys,
+        &db_path,
+        None::<&crate::secret_store::SecretStore>,
+    )
+    .unwrap();
+
+    let conn = open_retention_db(&db_path).unwrap();
+    let owner = owner_keys.public_key().to_hex();
+    for keys in [&pinless_keys, &later_keys] {
+        let agent = keys.public_key().to_hex();
+        assert!(
+            get_retained_event(&conn, KIND_MANAGED_AGENT, &owner, &agent)
+                .unwrap()
+                .is_some(),
+            "30177 for {agent}"
+        );
+        let row = get_retained_event(&conn, KIND_PRIVATE_MANAGED_AGENT, &owner, &agent)
+            .unwrap()
+            .unwrap_or_else(|| panic!("first 30179 for {agent}"));
+        let event = nostr::Event::from_json(&row.raw_event).unwrap();
+        private_managed_agent::validate_and_decrypt(&event, &owner_keys).unwrap();
+    }
+}
+
 #[test]
 fn fresh_record_is_retained_pending() {
     let dir = TempDir::new().unwrap();